Hello Paul,

I've been proselytizing an a&p friend extolling the virtues of my 13b.  He is curious about application in a helicopter.  Several helicopters use a horizontal engine with belts and pulleys to power the roters.  The engine output rpm needs to be 3000 to 3200.  Horsepower should be 200 or better.  Can a fuel injected 13b generate that much hp at 3000 rpm or am I even asking the right question. Is this really a torque question?

Your thoughts?

William Hagood
LexAmi
Supporting Excellent Teaching
Sent via I-Phone

The rotary is not a high torque engine. It must be geared down and it must be
run at 7500 RPM to get 250 HP. However many people are hung up on the
idea of high RPM. Just think of the rotary as you would a turbine or electric
motor. RPM is not a bad thing in a rotary until you get over 10,000 RPM and in
that case it is just like a turbine or an electric motor of the same
size and HP. An electric motor will also throw off its copper windings
at high RPM.

Paul Lamar